If you've been on the fence about checking out Spotify's premium subscription, the service has just introduced a 30-day trial period to subscribe for free.

The premium subscription adds advertisement free streaming and the ability to stream music on iPhone, Android, Symbian, and Windows Phone. Signing up for the premium service automatically initiates a recurring payment, but you can cancel it right away and still keep the premium subscription for 30 days. You can find the full details and sign up form on the Spotify blog below.